Pulse or digital communications – Systems using alternating or pulsating current – Antinoise or distortion
Patent
1998-01-30
2000-07-04
Pham, Chi H.
Pulse or digital communications
Systems using alternating or pulsating current
Antinoise or distortion
375346, 375296, H04B 1500
Patent
active
060849193
ABSTRACT:
The present invention relates to a communications system (100) that is capable of adapting to an unknown or varying spectral environment in a channel (14) between two communications units (12, 16). The system (100) maintains a spectral profile of the channel (14) and uses the spectral profile to determine appropriate transmit parameters for the system (100). The system (100) can be programmed to provide an optimal transmit signal for achieving a predetermined performance goal (such as, for example, maximum data rate at a given bit error rate (BER)) in light of the spectral environment in the channel (14). In one embodiment, the spectral profile is maintained in a spectrum table memory (27) that is periodically (or continuously) updated.
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Bergstrom Chad Scott
Campbell William Michael
Chuprun Jeffery Scott
Kleider John Eric
Bogacz Frank J.
Motorola Inc.
Pham Chi H.
Scott John C.
Webster Bryan
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